In a new promo for the upcoming movie, the 45-year-old actor challenged the 28 time Olympic medalist to some Baywatch related tasks.

Dwayne sees how long Michael can hold his breath, if he can blow up an inflatable whale and how well he does on a swim test.

“Ladies and gentlemen the most decorated OLYMPIAN of all time, Mr. 23 Gold Medals and now NEWEST member of #BAYWATCHð”¥. The GOAT @m_phelps00…We’re the (dysfunctional) Avengers of the beach. We are…#BAYWATCH #WhoNeedsMouthToMouth?” Dwayne wrote on his Instagram.